RFM69 HW / W

Hi All,
I am at the moment a bit confused about the usage of RFM69 HW or/ and W. Think too much informations spread over many many posts...
I want to rebuild my Sensors Netwirk based on RFM 868 Radios to replace the existing NRF24L01 where i have more and more problems with the coverage. I've saw in some posts different Statements about the usage for example on battery powered nodes. Some guys say its preffered to use on the gateway a RFM69 HW and on the battery powered nodes the W Version.
So whats now correct? Because I am from Germany and heard from some guys here, that the W Version is not allowed to use due to a too powerfull Signal. Hope somebody here can give me the right direction

@Markus - it makes sense to use the H when you need it.
H is good on the gw as @gohan said, but in the same time - if your w node is to far away it will not be able to reach the GW even it the gw is a H.

many thanks for the Information... Regarding the modules a last question..
Are the RFM69CW or HCW modules in view of the communication fully compatible to W or HW Modules? I know the footprint and maybe the pinout is different.